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Editorial Team
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Asked: 2026-06-16T13:50:18+00:00

Should I code something like this in view? <%= @childrens.count %> or controller @children

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Should I code something like this in view?

<%= @childrens.count %>

or

controller

@children = Parent.children
@children_count = @children.count

view

<%= @children_count%>

or should I add one column called ‘count’ in Parent table, and every time user creates new CommunityTopic record, should I re-count the number of records and save the number to ‘count ‘ column? at the same time, I’d like to update ‘at_modified(TimeStamp)’ of Parent table, when new CommunityTopic has been created.

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1 Answer

  1. Editorial Team

    You should execute db requests in the controller, not in the view.
    In your situation, counting the children could be done like so :

    @children_count = Parent.children.count

    And then display @children in your view :

    <%= @children_count %>

    By the way, check this link : http://web.archive.org/web/20100210204319/http://blog.hasmanythrough.com/2008/2/27/count-length-size It will give you additional information about when to use count, size, or length.

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